outmost importance that parameter setting DFTReference has the
same set value for all of the preprocessing blocks involved
IEC07000197.vsd
SMAI instance 3 phase group
SMAI1:1 1
SMAI2:2 2
SMAI3:3 3
SMAI4:4 4
SMAI5:5 5
SMAI6:6 6
SMAI7:7 7
SMAI8:8 8
SMAI9:9 9
SMAI10:10 10
SMAI11:11 11
SMAI12:12 12
Task time group 1
SMAI instance 3 phase group
SMAI1:13 1
SMAI2:14 2
SMAI3:15 3
SMAI4:16 4
SMAI5:17 5
SMAI6:18 6
SMAI7:19 7
SMAI8:20 8
SMAI9:21 9
SMAI10:22 10
SMAI11:23 11
SMAI12:24 12
Task time group 2
SMAI instance 3 phase group
SMAI1:25 1
SMAI2:26 2
SMAI3:27 3
SMAI4:28 4
SMAI5:29 5
SMAI6:30 6
SMAI7:31 7
SMAI8:32 8
SMAI9:33 9
SMAI10:34 10
SMAI11:35 11
SMAI12:36 12
Task time group 3
AdDFTRefCh7
AdDFTRefCh4
IEC07000197 V2 EN-US
Figure 98: Twelve SMAI instances are grouped within one task time. SMAI
blocks are available in three different task times in the IED. Two
pointed instances are used in the following examples.
The examples shows a situation with adaptive frequency tracking with one
reference selected for all instances. In practice each instance can be adapted to the
needs of the actual application. The adaptive frequency tracking is needed in IEDs
that belong to the protection system of synchronous machines and that are active
Section 17 1MRK 505 388-UEN B
Basic IED functions
282 Busbar protection REB650 2.2 IEC
Application manual
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